CRPC-TR98753						April 1998

Title: ScaLAPACK Evaluation and Performance at the DoD MSRCs

Authors: L.S. Blackford, R.C. Whaley

Submitted August 1998; Available as LAPACK Working Note 136

Abstract:
This report presents performance results for a subset of ScaLAPACK driver
routines and PBLAS routines on the Cray T3E, IBM SP, SGI Origin 2000, and
SGI Power Challenges Array platforms at the Department of Defense (DoD)
CEWES, ARL, and ASC Major Shared Resource Centers (MSRCs).  Performance
is analyzed using SGI MPI v3.0, versus MPICH version 1.1.0 on the SGI
platforms, and MPI versus shmem on the Cray T3E.  On the Cray T3E,
correctness of the version of the ScaLAPACK included in LIBSCI is tested,
and performance timings are compared against the freely available version
of ScaLAPACK included in PESSL is tested, and performance timings are
compared against the freely available version of ScaLAPACK on netlib
using the MPIBLACS.  On the SGI platforms, ScaLAPACK performance using
distributed memory BLAS (PBLAS) is compared to LAPACK performace using
the multi-threaded MP BLAS.

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L.S. Blackford		R.C. Whaley
susan@cs.utk.edu	rhwaley@cs.utk.edu
Department of Computer Science
University of Tennessee - Knoxville